Snap-switch multiple fuse.



N. E. LEMMON. 'ENAP SWITCH MULTIPLE FUSE.

.QBPLIGATION FILED DEC. 29, 19 10.

Patented Aug. 27, 1912.-

M, 1 M M 5 M M /./L m a m w NF v srnrns PATENT OFFICE.

NURM N E. 'LE'IYIMUN, Q? LEIIUAGO, ILLINOXS.

MULTIPLE FUSE.

I :JAOWH that I, NORMAN or the United States a, eslclcnt of Chicago, Cook county, illiis, have invented s certain new and use Improvement in Snap-Switch Multiple j of which following is e Eu Lennon in. ion contemp pie fuse: B this which operates on t ry snen switch. and ihe s "itch is snapped to thereby bring lncr fuse into circuit, As herein J the multiple fuse consists of rotary 11 having the fuse strips extending clinclly thereof, at nomts equioisssme, and with accmmutctor: each end.

comlnutntors are engaged. by lles which are adopted to be connected iy'tc successively include the differst-rips in; circuit. The axis of the J -ilcr is coincident the t handle or rotary thumb piece switch {)rctinarily, i c crsc, c s merely two positions one to open & circult and one to close we some, and s n of the switch one posi- "othe other will, tliereitmxe o "ncrily cl e or open circuit. '& 'it-li my construction, llQWGV "11c snap lice plnrclnry o3? positions, but icn itisadopted to maintain the conn of the circuit which controls, the medium of c st, ip, wlier time it; is sncppcrl or op ated, it

the circuit instcadscfopening issmnc. sc snrips are removable, anti may be y suitable number, whereby the clerics sugnlietl. with new stains-cs soon: as ones are burned out. vicusiv, ever, the mere burning out of: the fuse tines nob, with my improved construe necessitate such renewal at once, as h case all: that is necess; ry is simply to the switclr and: thereby bring new tics strip into circuit. As I soy therefore, invention: contemplates broadly a snap :cla multiple fuse.

Epecincation e12 net-tars Fatent.

the circuit wires, and which serve in Patented Aug. 275 1912;

l is a side elevation of a snapswitch multiple fuse embodying the-principlesioi my invention, showing the door of the banner in.- closurc thereof open to bring intovicw the rotary cylinder upon which the strips are niountcd and also'thc conmmtalzorsaml brushes for the ends of suidcylind'er; as will hereinafter more fully appear; Fig; longitudinal section on line 22 in Fig.1. Fig. 3 is a cross section onlline 3r-3;in Big: 2. Fig. l is a detail View of sporticn of? the switch mechanism, Fig. 5 s'liriws tlie ecccn tric strap or locking; devicc for the. snap switch, Figs. 6 and 7 are detsilsof the snap switch mechanism.

As thus illustrated, the box or closureili may be of any suitabloilm'own. or approvsbil character, and may be provided with a door or cover a mounted on hinges on, and held in place by a spring catch- The switch shaft; 13 extends centrally andcl ongitudinally Elisaof the said box or closure, and is provided at its outer end with in handle on thumb piece 5 for the rotation on operation thereof Near this handle or thumb piece the said shaft is supported inn suitable bearing; 5' one end of said box or closure, and: at its other end the said shaft is supported! in" a bearing 2 in thcjother end ofsaitliboxn At this endthe seicl slicft is provixiecl withoir cnmferential notches b and if that arcs-n.- gcgetl respectively by the notched Washers c and 5, such as shown in Fig. 6, whereby the shaft is held against endwiscdisplace- The stop plate C encircles the saidat a. point between the Washers b" and Z), and issccured-to-thecnd well either loci; in suitablemanner;- The saidstop plarteis, in this case, proridecl' with: four equidistant stops 0 which extend radially relative to the axis 0's scitlshafn.

The fuse cylinder D is preferably made of somcinsulnting material, and is hollow, being provided at opposite cncls with plugs d and oi oi insulating material. These plu ercloose on. the-shaft B and the plu d is rovidecl with a metal bushing d t 9 lat,- l er having a recess (is on its outer face; which recess is connected with the periphery or circumference of theplug by means 033 a notch d. tllcsaid shaft and disposed in the recess 03; and an eccentric strap (i is'monnted unsold eccentric cam and provided with a catch 0:: locking bolt (1, which laktcr is cdaptedfibo engage the stops 0-, previously mentioned.

An eccentric camel? is secured in tator ring f, and its other end connected to one of the sections f of the sectional comnuitator at the other end of the cylinder. The brushes G and G engage respectively the ring f and the sections f, and are connected in any suitable manner with the terminal cables or circuit conductors Hqyhereby the said fuse strips are successively connected in circuit by the rotation of the switch. It will be understood, of course,

'that the said commutator-s and the said brushes may be made of any sultable metal.

The fuse strips can also, of course, be made of any suitable metal.

When the shaft B is rotated by a right hand turn given the handle or thumb piece 6, such rotation tends to wind up the spring E, one end thereof being held stationary by the engagement of the locking bolt (Z with one of the stops 0, in the manner shown. This same rotation, however, serves to opera-to the eccentric cam (Z withthe result that the locking bolt 6Z7 is moved away from the shaft, thus causing the shoulder of the said locking bolt to rise above or move outward beyond the end of the stop cwith which it is engaging, thus leaving the cylinder unlocked and free to instantly rotate under the tension ofthe said. spring. Such rotation of the cylinder serves, of course, to rotate the eccentric strap (Z on the eccentric cam, and to thereby throw the locking bolt d" toward the shaft sufficiently and in time to enable it to engage the stop 0, thus limiting the rotation of the cylinder to a.

one-quarter turn thereof. It will be seen that the different fuse strips are so p'osi 'tioned on the outer surface of the cylinder, that the limit of rotation of thecylinder always brings a new fuse strip into circuit with the two brushes. When a fuse strip blows or burns out, all that is necessary is simply to snap the switch, and thereby bring a new fuse strip into circuit. The operation of the shaft winds up the spring, and at the same time unlocks the cylinder from its last position, enabling the tension of the spring to cause the cylinder torotatefcr a quarter of its circumference. point it is automatically stopped or arrested in its movement, with the result that another fuse'strip is substituted for the one that was b'urnedout. There are no open At this posit-ions for the snap switch, it will be seen, as each time the switch is snapped, it closes the circuit. If it is snapped from one fuse strip to another, it will simply momentarily open the circuit, and then im'- mediat'ely close it. On the other hand, and when the switch used for substituting a fresh fuse for one that is burned out, then its operation will serve merely to close a circuit which has been left open by the blowing or burning out of one of' the fuse strips. In this wayit will be seenthat the blowing or burning out of a fuse strip does not necessitate the immediate renewal thereof, as a mere snapping of the switch will substitute another one therefor, and thus no repair work is necessary until after all the fuse strips have been used up in this manner.

What I claim as my invention is:

1. A snap switch multiple fuse comprising a rotary cylinder, a plurality of fuse strips extending longitudinally thereof, commutators for the ends of said fuse strlps, mounted on said cylinder, terminal brushes e..gaging said comnuitators, a shaft extending axially of the said cylinder, means for rotating said shaft,-',-a spring connecting the shaft with said cylinder, a device for locking the cylinder against rotation while the shaft is being initially rotated, and means on the shaft for operating the device to unlock the cylinder, to permit the spring to rotate the cylinder, adapted to cause said device to again lock the cylinder against rotation as soon as another" fuse strip is brought into circuit with said brushes.

2. In a snap switch multiple fuse, a rotary cylinder, a plurality of fuse strips eX- tending longitudinally thereof, c'ommutators for the ends of said cylinder, electrically connected with said fuse strips, brushes for said commutators, ashaft extending through i the cylinder, provided ,With'means for m tating it, a spring connection between the shaft and cylinder,' .m eans for placing said spring 'under tension by rotation of said shaft, means independent of the-fuse strips for normally preventing said cylinder from rotating, and means for releasing said cylinder upon said shaft being rotated to permit the same to rotate and bring the next fuse strip into operative position.

3. A snapswitch multiple fuse comprising a rotary cylinder,' a plurality of'fuse strips extending longitudinally thereof,

commutators for the ends of said fuse str1ps,'mounte d on said cylinder, terminal brushes engaging said co'mmutators, a shaft extending" axially of the said cylinder,

means forrotat-ing said'shaft, a' spring connecting the shaft with said cylinder, alockv ing plate having a plurality oflocking prol jections, a cam mounted" upon said shaft,

. astrip mounted upoii'saidcam and, having .1

a locking boltadapted to engage said looking projections, to lock said cylinder against rotation while the shaft is being initially rotated, said cam being so positioned that the rotation of said shaft causes said cam to move the locking bolts out of engagement with said locking projections, to permitthe spring to rotate the cylinder, and to permit said locking boltto again engage the next succeeding locking projec- 10 tion, to again lock the cylinder against rotalion.

Signed by me at Chicago, Illinois, this 17th day of December, 1910. NORMAN E. LEMMON. WVitnesses:

J. NORBY, S, LEWIS. 

